When leading out along ridges, simulclimbing or otherwise, in addition to placing gear, I like to drape the rope on alternating sides of horns and other features I encounter along the way -- i.e. first the rope passes a horn on the left, then on the right, etc.
Ditto on keeping a few pieces of bomber gear in. I would not feel comfortable simulclimbing if the gear was not good, or if there was no pro (i.e. chossy gully). The same goes for steep snow.
I always like to keep at least a small coil with me when simulclimbing. I don't like the idea of being at the end of the rope in an emergency.